Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
FIXED AIR, n.phr. Chem. The name applied by Joseph Black to the gas he discovered by heating calcareous limestone, now called carbon dioxide (1755 J. Black in Experiments upon Magnesia Alba, etc. (Alembic Club Reprints No. 1) 22 sqq.).
